Resumo em Português:
São apresentadas medidas do "standing-crop" e do peso de Spartina alterniflora em um "salt-marsh" de Cananéia. O "standing-crop" foi de 816 ± 187 g de peso seco/m-2 ou 699 ± 164 g peso orgânico/m-2 no pico da estação de crescimento. Em uma área desnudada, o crescimento máximo observado ocorreu em julho, quando a Spartina atingiu 130 cm. A primavera, o verão e o inverno foram, respectivamente, o inicio, o pico e o fim da estação de crescimento. Cinzas, Mg, Ca e Fe tiveram concentração maior em Spartina morta do que nas vivas.Resumo em Inglês:
Measurements of the standing-crop and height of Spartina alterniflora on a Cananeia (SP) salt-marsh are presented. The standing- crop was 816 ± 187 g dry weight m-2 or 699 ± 164 g organic weight m-2 at the peak of the growing season. In the desnudated area the maximum grass height was found in July, when Spartina reached 130 cm. Spring, summer and winter were the beginning, the peak and the end of the growing season, respectively. Ash, Mg, Ca and Fe showed higher concentrations in dead rather than in living Spartina.Resumo em Português:
A tolerância de varias espécies de medusas a valores decrescentes de salinidade e temperatura foi estudada em laboratório. Os resultados mostraram a seguinte ordem de tolerância em relação á água do mar diluída: Cirrholovenia tetranema, Clytia cylindrica e Eucheilota duodecimalis > Proboscidactyla ornata e Obelia spp. > Euphysora gracilis, Ectopleura dumortieri, Liriope tetraphylla e Cunina octonaria. Em relação á diminuição de temperatura, os seguintes resultados foram obtidos: Ectopleura dwrortieri, Euphysora gracilis, Obelia spp. e Proboscidactyla ornata > Liriope tetraphylla > Cunina octonaria > Clytia cylindrica e Eucheilota duodecimalis. Estes resultados obtidos em laboratório foram discutidos levando-se em conta a distribuição dessas espécies na natureza.Resumo em Inglês:
The salinity and temperature tolerances of some species of medusae were studied in the laboratory. The results showed the following order of tolerances in diluted seawater: Cirrholovenia tetranema, Clytia cylindrica and Eucheilota duodecimalis > Proboscidactyla ornata and Obelia spp. > Euphysora gracilis, Ectopleura dumortieri, Liriope tetraphylla and Cunina octonaria. In relation to the decrease of temperature, the following results were obtained: Ectopleura dumortieri, Euphysora gracilis, Obelia spp. and Proboscidactyla ornata > Liriope tetraphylla > Cunina octonaria > Clytia cylindrica and Eucheilota duodecimalis. The results obtained in laboratory were discussed in relation to the distribution of the species in nature.Resumo em Português:
É descrita no presente trabalho uma serie de esponjas tetraxonidas, co letadas no Atlântico Sul entre Cidreira e Sarita, pelo N/Oc. "Prof. W. Besnard", durante o período de junho a dezembro de 1968, com dados sobre a salinidade e a temperatura dos pontos de coleta, bem como sobre a distribuição geográfica e batimêtrica dos exemplares estudados.Resumo em Inglês:
Six species of tetraxonid sponges occurring in southern Brazil are studied: Jaspis johnstoni (Schmidt, 1862); Geodia eosaster (Sollas, 1888); Erylus oxyaster Lendenfeld, 1910; Pachastrella monilifera Schmidt, 1868; Sphinctrella cribrifera (Sollas, 1886) and Coscinospongia typus (Schmidt, 1870) . Data are also given on the temperature and salinity for the oceanographie stations where the specimens were collected in the South Atlantic coast at Rio Grande do Sul (Lat. 30º60'S - 33º29'S and Long. 49º13'W - 50º44'W). The collections were made by R/V. "Prof . W. Besnard", from 150-284 m depth, during the period of June to December, 1968. All species are recorded for the first time for the coast of Rio Grande do Sul. Morphological characteristics and spicular structure of the specimens are described and illustrated. Spicular measures are also given for the material studied.Resumo em Inglês:
In the South Atlantic nearly the Brazilian coast, at low latitudes, the layer of minimum oxygen concentration shows distinct values between the Equatorial region (7ºS) and the region limited by latitudes of 18-22ºS. In the vicinity of the Equator the minimum concentration is remarkably clear (2,0 ml/l at 7ºS) and at 22ºS the minima values raise up to 4.0-4.5 ml/l. The minimum oxygen layer follows the isopynics surfaces (σt = 26.8-27.2) in depths of 300-400 m (7ºS) and 600-800 m (22ºS) . The oxygen concentration in this area results from a biochemical and physical processes, due to the presence of poor water Brazil Current southward and the rich one Intermediate Antartic water flowing northward.Resumo em Inglês:
This annotated bibliography is an attempt to bring together all available published records on the parasitic isopods of Chondrichthian fishes as a basic reference source. An effort was made to synonymise old names according to the presently accepted scientific names.Resumo em Inglês:
This paper is a survey of the main spectral methods potentially useful in Oceanography. These methods are applied to the analysis of tides, seasonal variations and ocean geophysical oscillations. Further topics on the Response Method, the Maximum Entropy method and Rotary Components are briefly summarized. Examples of successful appli cations are presented.